#forkongithub a{
  background: rgb(50, 51, 54);
  color:#fff;
  text-decoration:none;
  text-align:center;
  font-weight:bold;
  padding:5px 40px;
  font-size:1rem;
  line-height:2rem;
  position:relative;
  transition:0.5s;
}

#forkongithub a:hover{
  background: rgb(44, 44, 44);
  color:#fff;
}

#forkongithub a::before, #forkongithub a::after{
  content:"";
  width:100%;
  display:block;
  position:absolute;
  top:1px;
  left:0;
  height:1px;
  background:#fff;
}

#forkongithub a::after{
  bottom:1px;
  top:auto;
}

@media screen and (min-width:800px){
  #forkongithub{
    position:fixed;
    display:block;
    top:0;
    right:0;
    width:200px;
    overflow:hidden;
    height:200px;
    z-index:9999;
  }

  #forkongithub a{
    width:160px;
    position:absolute;
    top:36px;
    right:-64px;
    transform:rotate(45deg);
    -webkit-transform:rotate(45deg);
    -ms-transform:rotate(45deg);
    -moz-transform:rotate(45deg);
    -o-transform:rotate(45deg);
    box-shadow:2px 2px 5px rgba(0,0,0,0.8);
  }
}
